Improvement in bronzing-machines



' NIT A'IENT: Crimen LOUIs e. OIIAPUT, wILLIAiwI nnAInwoon, AND JOHNnnAIDwooD, on

New YORK, N. Y.

EMPRVEMENT IN BRONZINCl-'MACIJHNES.`

Specification forming part of Letters Patent No. 144,741, dated November18, 1873 application `filed August 7, 1873. I

To all whom it may concern.:

Be It known that we, LOUIS G. CHAPUT,

WILLIAM BnArnwoon, and JOHN BRAID- y topview of the same.

Similar letters indicate corresponding parts.

This invention relates to a brOnzing-in achine in which the material orweb to be bronzed is fed in between an endless apron and abronzi-ng-roller, the surplus bronze being swept off by means ofbrushes, and deposited on an inclined plane leading down to thebronzingreservoir, whence the same is taken up by the -bronzing-rollerto be. applied over and over again. While the Web is being acted on bythe brushes it is supported by cords which eX- tend inoblique directionsunder the endless apron, being held in position by grooved rollers, sothat the brushes are enabled to reach every part of the surface of theweb. With the oblique4 cords is combined an adjustable comb, to preventthe web on its passage out of the machine from catching under any of thecords. With the comb and the cords is combined a delivery-roller, toinsure the discharge of the web.

In the drawing, the letter A designates a box, the sides of which formthe working `parts of our machine. To one end of this box is secured atable, B, over which the web or the material to be bronzed is fed. Onbeing passed into our machine, the web is caught between the endlessapron C and the bronzing-roller l), that surface of the web on which thebronze i is to be applied being turned downward. The

endless apron C is stretched over two rollers, E E', and its lowerbranch is slightly depressed by an intervening roller, G. Thebronzingroller D is covered with velvet, felt, or other suitablematerial, and it dips into the fountain H, which contains the powderedbronze, and the bronze taken up by said roller is transferred to thesurface of` the web, where it adheres to those portions that havepreviously received an ilnpression with some adhesive substance. Onleaving the bronzing-roller the web passes upon a series of cords orstrings,

1), which are stretched over rollers e de f, two

cords, and at the same time said apron sup" ports the web against theaction ofthe brushes g, which are situated beneath thecords. The

object of these brushes is tosweep off the sur` plus bronze from theweb, and they act on the web through between the cords. 1f the cordsextend in a direction parallel to the :motion of the web, they preventthe brushes from acting I on all parts of the web, and the surplusbronze is not swept off from those portions of the web which are coveredby or opposite the cords. This difiiculty we have overcome by providingeach of the string-rollers d and f with a series of grooves, (see Fig.2,) so that the strings or cords can be made to run through the machine`in oblique directions, and by employing two or more brushes those partsof' the web which are not touched by one brushwill be reached byanother, and the surplus bronze is swept oif uniformly over the entiresurface of the web. As the web passes the roller E of the apron, it iscarried along merely by the cords, and if one of the corners of said webshould turn down it would be caught between fthe cords and the roller d,whereby the samewould be liable to get torn, and the operation of themachine would be interrupted. This difficulty we have overcome byarranging beneath the cords, in front of the roller d, a comb, h, theteeth of which are curved, and the head of which consists of a rockingcrank-shaft, so i that the curved backs ofthe teeth can be made toproject above the cords toa greater or less 1 extent. By these means theweb isprevented from catching under the cords, and it is safely guidedout over the roller d. If the comb h is not required, its teeth can beturned down out of action. On the roller d rests the delivery-roller c',Which bears down on the same by its inherent gravity, and revolves bycontact with the same, or with the Web resting thereon. This rollerinsures the discharge of the Web. The surplus bronze which is swept offfrom the Web by the action of the brushes drops down upon an inclinedplane, I, which leads into the fountain H, so that the surplus bronze isreturned automatically to the fountain, and the machine can be operatedfor a long time Without requiring a fresh supply of bronze.

In practice, the rollers E E', which carry the endless apron, thebronze-roller D, and the string-rollers c, d, e, and f, Will be gearedtogether so that they move With a uniform supercial Velocity, While thebrushes g may be made to revolve in the same direction with thestring-rollers, but with a greater superficial velocity; or they may bemade to revolve iu an opposite direction to said string-rollers.

Vhat We claim as new, and desire to secure by Letters Patent, is-

1. The cords or strings I1, running in an oblique direction by means ofgrooved rollers df, in combination with the endless apron O,bronzing-roller I), and brushes g g, substantially as shown anddescribed.

2. The comb h, in combination with the oblique cords or strings b,delivery-roller z', and apron C, substantially as and for the purposeset forth.

3. The combination of the inclined plane I, fountain H, bronzing-rollerD, apron C, cords b, and brushes g, constructed and arrangedsubstantially as shown-and described.

LOUIS GEO. OHAPUT. WVM. BRAIDVOOD. Witnesses: JOHN BRAIDVVOOD.

W. I-IAUFF, F. H. GENTNER.

